Silk product and process for the treatment of silk.



UNITED STATES PATENT OFFICE.

JACGB KNUP, OF PAT-ERSON, NEWJERSEY, ASSIGNQ'R T O THEHE-L LW-IG SILK DYEING COMPANY.

' SILK PBOD UC'LAND PROGESS FOR THE TREATMENT OFSILK.

. Te 'allwhom itma/y concern:

' Be it known that I, J'AGOBKN P, a citi- Paterson, in the county of Passaic, State of .New Jersey, have invented a certain new and usefullfiilk Product and Process for .the Treatment of Silk, of which the-following is. a .full, clear, and exact-specification;

, I My invention relates to a process of treatingisilk to reduce therefrom 'a weighted .silk of a unlform blue black" color and to the product. of the .said process. ()ne of the objects of theinvention is to provide a process of producing a weighted .silk .of .a uniform blue will be particularly simple, inexpensive and efficacious as compared with processes here- .tofore employed and. asecond 'object of my invention is-to provide atin-weighted silk having a -.uniform-blue .black color and which however heavily Weighted, is stronger and generally more a satisfactory .than weighted blue black silksv heretofore pro .duced.

In the, practice. vof-tmy process, I -fi-rst weight the silk and directly thereafter-sub- ;jectit to a bath of, -.pyrolignite of iron (black-iron) 'or its equivalent, then to a bath'eontaining tannin. 'The treatment of the silk with a tannin-containing bath must dye treatment to dye the same blue black. This treatment a I follow and not precede the treatment with pyrolignite of iron or its equivalent.

The weighting treatment is preferably --that employed to Weight silk which is to be dyed in colors or is not to be dyed black and is hereinafter set; forth. The dyeing treatment hereinafter termed blue black is substantially the treatvment to which. unweighted silk is subjected is also hereinafter set forth. In the weighting treatment as preferably practiced,- a solution of chlorid of tin preferably tin 5 vtion with a solution of phosphate of soda,

5o potash, or

' either alone or with a solution of silicate of soda. Instead of using the phosphate of soda or the phosphate and silicate of soda, Inlay employasolution of ammonia, soda or a carbonate of one of these, the alkalies being, it is to be understood, the equivalents of the phosphate or phosphate and silicate of soda in the practice of my process. i

black color which tetra-ehlor-id, is used in combina- Specification of lzetters Patent. Application filed December 28,1908. Serial No. 186,900.

"Patented Aug. 17, 1909.

process, the silk is first boiled ed and is .thereafter. put into a cold solution of tin -.tetra-chlorid of about 30 Baum and sub- .jected to this solution for approximately an hour, after which the silk is washed and then worked in a warm solution of phosphate of 'soda or other alkaliaof 4 Baum at a tem- 'perature of about 150 F. for approximately one hour. It is .then again -washed; and thereafter subjected-to a warm solution of silicate of soda of 3 Baum at a temperature of about 120 F. for about one hour. The silk is thenagain washed and the treatment repeated until the desired weight is obtained. Instead of following this. particular order of treatment, the silk may, as hereinbefore indicated,-be alternately sub- -jected a number, of times to the solutions of:ch1orid oftinand phosphate of soda After the silk has been weighted in the manner set forth, it is next subjected to the blue black dye treatment which consists in first subjecting the weighted silk to a solution of pyrolignite of iron, 7'. 0., a solution of iron in crude acetic acid and then to a solution of tannin-containingmaterial.

In practice, I employ a bath of iron pyrolignite solution of 1 to 5 Baum, but the strength :of the solution depends upon the shade-desired, the stronger the solntlomlhc bluer will be the shade resulting from the treatment. The silk is worked in the solution of iron pyrolignite at a temperature of approximately F., forabout one hour and isthen wrung out and after being covered'ior about two hours, is worked and is then placed in the tannin-containing bath. This bath .is preferably composed of a solution of amber, or rather tannin-containing materia to which has been added extracts of logwood and fustic or other yellow vegetable dye, the proportions of which ingredients wary according to the shade desired, and the silk is worked in this solution for approxi- In the preferred practice of the weighting l inately two lhQlll'S. It has been found that I pounds of fustic During the last described operation, which is continued for about two hours, the solution is preferably maintained at a temperature of about 160 F.

After the treatment in the tannin-containing bath, the solution is worked and subjected to a solution of logwood extract and soap, and thereafter the silk is finished by treatment with lemon juice and oil. The bath of logwood extract and soap preferably contains about 20 pounds of logwood extract and 50 pounds of soap to each 100 pounds of silk treated, and the silk is preferably allowed to remain in this solution for about two hours, the temperature bein raised from about 110 1 at the outset unt' -the desired blue color is obtained. This usually occurs at a temperature of about 150 l+., although the results vary somewhat according to the character of thesilk under treatment and the difference in working the weighting process.

In the final step of the process, I preferably employ a solution of approximately two gallons of lemon juice and one and onehalf pounds of oil, preferably olive oil, to

each hundred pounds of silk treated.

The product of the hereinbefore recited process may be identified and recognized by its behavior upon being subjected to the usual burning and acid tests, which behavior may be readily determined by one skilled in the art by applying such tests to the said prod-, uct. Upon immersion in concentrated oxalic acid, the roduct produced as hereinbefore set forth, it will be found to turn a reddish brown or light yellow and, upon burning,

such product will leave a well preserved ash structure having a slightly brownish or salmon shade.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. The process for the treatment of silk to obtain a Weighted silk of a uniform blue black color, Which consists in wei hting the silk, then subject-ing it to a bath or pyrolignite of iron and thereafter to a bath containing tannin.

2. The process for the treatment of silk to obtain a weighted silk of a uniform blueblack color, which consists in weighting the silk with tin, a phosphate and a silicate; then subjecting the silk to a bath containing iron and then to a bath containing tan nin and logwood, after the iron bath but not before.

3. The process for the treatment of silk toohtain a blue-black color, which consists in weighting the silk with tin, a phosphate and a silicate; then subjecting the silk to a bath of pyrolignite of iron and then to a bath containing tannin andlogwood.

4. The process for the treatment of silk to weighting the silk in successive baths containing tetra chlorid of tin, phosphate of;

soda and a silicate; then subjecting the silk to a bath of'pyrolignite of iron, and then to treatment with gambier, logwood, and fustic, and then to a bath with logwood and soa 6? The process for the treatment of. silk to obtain a blue-black color, which consists in weighting the silk in successive baths containing tetrachlorid of tin, phosphate of soda and a silicate; then subjecting the silk to a bath of pyrolignite of iron, then to treatment with gambler, logwood and fustic, then to a bath with logwood and soap, and lastly to treatment with an acid and oil.

7. The process of dyeing tin-weighted silk a uniform blue-black, which consists in weighting the silk with tin, then subjecting it to a bath of black iron, and finally treatng it with suitable vegetable extracts or yes.

8. The process of d eing silk blue-black, obtaining a product of any desired weight; which consists in weighting the silk with tm, subjecting it in sequence to an acidulated bath, a black-iron bath, a black-iron gambier bath,- containing inatter for coloring accordin to the shade desired, and, then, to the dye bath, substantially as described. A

9. A weighted silk of a uniform blue black color, said silk being impregnated with a tin salt and pyrolignite of iron and said silk turning a reddish brown or yellow shade upon immersion in concentrated oxalic acid and leaving a well preserved ash structure upon being burned, said ash structure-having a slight brownish or salmon color.

10. A weighted silk of, a uniform blue black color, said silk being impregnated with a tin salt, a phosphate, a silicate and pyrolignite of iron tannin and a vegetable dye and said silk turning a reddish brown or yellow shade upon immersion in concentrated oxalic acid'and leaving a weil preserved ash structure upon being burned said ash structure having a slight brownish or salmon color.

11. A weighted silk black color, said silk of a uniform blue being impregnated 5 with a tin salt, a phosphate, a silicate, and

with a tin salt, a phosphate and pyrolignite with a-tin-salt, a phosphate; a silicate, pyroof iron. v lignite of iron and tannin. 10

12. A wei hted silk having a uniform In witness whereof I have hereunto set my blue black 00 or, said silk being impregnated hand-in presence of two witnesses.

e JACOB KNUP.

pyrolignitie of iron. I v Witnesses:

13. A wei hted silk having a uniform GLEN Enorsn MGELHONE, blue black co 013 said silk being impregnated O'rro MUNK. 

